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My team and I have recently
been trying to stream line our AIX disaster recovery process. We’ve been
looking for ways to reduce our overall recovery time. Several ideas were tossed
around such as a) using a standby DR LPAR with AIX already installed and using
rsync/scp to keep the Prod & DR LPARs in sync and b) using alt_disk_copy
(with the –O flag for a device reset) to clone rootvg to an alternate disk
which is then replicated to DR. These methods may work but are cumbersome to
administer and (in the case of alt_disk_copy) require... [More]

There are two new HMC (V7.7.3.0) commands that can force a client Virtual Fibre Channel adapter to log into a SAN. This should make the life of the AIX and SAN administrator easier, as they will no longer need to install AIX in order for the new VFC adapters to log into the SAN. Although there was an unsupported method* for doing this already (see links below). Nor will the SAN admins need to “blind” zone the WWPNs. There was some indication of this in the latest VIOS FP readme: ... [More]

I was
collecting a list of WWPNs for a bunch of new AIX LPARs I was installing from
scratch. There were two ways I could find the WWPN for a virtual Fibre Channel
adapter on a new LPAR i.e. one that did not yet have an operating system
installed. I started by
checking the LPAR properties from the HMC (as shown below). To speed
things up I moved to the HMC command line tool, lssyscfg , to display the
WWPNs (as shown below). hscroot@hmc1:~> lssyscfg -r prof -m 750-2
-F virtual_fc_adapters --filter lpar_names=lpar1... [More]

The first
time I ran the ’ viostat –adapter’ command I expected to find
non-zero values for kbps , tps , etc, for each vfchost adapter. However, the values were always zero, no matter
how much traffic traversed the adapters.
$ viostat
-adapter 1 10
... vadapter: Kbps tps
bkread ... [More]